<div class="code-input">
  <label for="result">支付密码</label>
  <div class="chars">
    <input type="text" maxlength="1" class="char">
    <input type="text" maxlength="1" class="char">
    <input type="text" maxlength="1" class="char">
    <input type="text" maxlength="1" class="char">
    <input type="text" maxlength="1" class="char">
    <input type="text" maxlength="1" class="char">
  </div>
  <input type="text" class="result" name="result" hidden>
</div>